/Engine/Source/Runtime/Engine/Classes/Materials/MaterialInstanceDynamic.h
Interpolates the scalar and vector parameters of this material instance based on two other material instances, and an alpha blending factor The output is the object itself (this). Supports the case SourceA==this || SourceB==this Both material have to be from the same base material
void K2_InterpolateMaterialInstanceParams ( [UMaterialInstance](API\Runtime\Engine\Materials\UMaterialInstance) * SourceA, [UMaterialInstance](API\Runtime\Engine\Materials\UMaterialInstance) * SourceB, float Alpha )